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Effect of ultrasonic waves on the rheological features of secondary sludge

Paper ID Volume ID Publish Year Pages File Format Full-Text
3881 197 2010 6 PDF Available
Title
Effect of ultrasonic waves on the rheological features of secondary sludge
Abstract

The increasing production of sewage sludge is a problem for wastewater treatment plants today. Research has sought to improve sludge processing efficiency and minimization. This study examined the changes in the rheological features of secondary sludge as a function of ultrasonic specific energy. It has been analyzed the dependency of steady state viscosity on shear rate and the hysteresis area. Steady state viscosity and the hysteresis area decreased significantly with increased ultrasonic specific energy. This may be due to the disruption of sludge flocks leading to a less rigid internal structure. The centrifugation of ultrasonicated sludge increased the total solid content by approximately 21%, leading to dewatered sludge. This sludge showed less elasticity, viscosity and thixotropy than untreated sludge.

Keywords
Secondary sludge; Ultrasonication; Rheology; Thixotropy
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 52, Issues 2–3, 15 November 2010, Pages 131–136
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us